Sunday marks one-year until the voting polls open for the 2012 presidential election. In recognition of Election Day 2012, local Barack Obama “grassroot” campaign offices are opening their doors to potential volunteers.

“Exactly one year before the 2012 election, grassroots neighborhood teams from across Metro Detroit are opening up the doors of our headquarters – and we need you there,” reads a message on Obama’s campaign website. “Over the next 365 days, the Metro Detroit Organizing for America-Michigan Headquarters will be the center of action to support our neighborhood teams as we work to reelect President Obama.”

Campaign offices across the nation, including three in Metro Detroit, are hosting open houses Sunday: From 1-4 p.m. the Warren Grassroots Headquarters, 8322 E. 12 Mile Road, Warren, is opening its doors for the first time; from 2-4 p.m. Oakland County Grassroots Headquarters, 91 N. Saginaw St., Suite G100, Pontiac, is hosting its open house; and from 4-8 p.m. Detroit Grassroots Headquarters, 2727 Second Ave., Detroit, is opening its doors.

According to officials, open house attendees will learn about campaign efforts, find out how to get involved and be able to join a neighborhood team.

“Tomorrow, we'll be one year away from Election Day 2012,” reads a Tweet from @BarackObama. “Join a day of action in your community.”